Can anybody help am trying to trace half sister in france born to my polish fath

Question:

Can anybody help am trying to trace half sister in france born to my polish father around 1940?

this daughter was born after my father left france to fight with the british RAF have tried many sites on the internet without success would be very grateful to anybody who can steer me in the right direction

Best Answer - Chosen by Asker: The International Red Cross has been providing a service to reunite families displaced by war. It's a very good program and they still have all of the records of those who registered to find family members whom they lost contact with during WWII. You can find more information on it by contacting your local Red Cross office, and they'll help you get in contact with the office that handles these inquiries in the US.